Method for producing a spherical ion exchange resin

Details Method for producing a spherical ion exchange resin Method for producing a spherical ion exchange resin

1996-02-20

1997-06-10

Zitomer, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

521 32, 525344, 525353, 525354, 525355, 5253591, 525379, 525380, 5262323, 5262325, 526227, C08F 836, C08F 832, C08F 436

Patent

active

056376278

ABSTRACT:
A method for producing a spherical crosslinked copolymer, which comprises polymerizing a monofunctional addition-polymerizable monomer and at least 0.5% by weight of a polyfunctional addition-polymerizable monomer on the basis of the total weight of monomers by suspension polymerization in an aqueous medium in the presence of a radical polymerization initiator of the following formula (b) which has a decomposition temperature for a half-life period of 10 hours within a range of from 60.degree. to 120.degree. C. and which is capable of forming at least four radical initiating points per molecule by the decomposition:

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Macromolecules, 1993, vol. 26, pp. 2246-2252, R.F. Drumright, et al., "Cycloalkane Perketal Initiators for Styrene Polymerization. 1. Decomposition Chemistry of 1,1-Bis(tert-Butylpmeroxy) Cyclohexane".
Macromolecules, 1993, vol. 26, pp. 2253-2258, R.E. Drumright, et al., "Cycloalkane Perketal Initiators for Styrene Polymerization. 2. Decomposition Chemistry of gem-BIS(tert-Butylperoxy) Cycloalkanes".

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